Inspect the passives well. Maybe a zap has hit the belly of the caps or something inside them. Push them up half a mm off board for a check.
Q2 replaced, voltage in goes up to 330V, out still 240V, now I can't adjust current anymore, only between 5-6mA, input Voltage then varies between 330-340V...
Is there Vgs in Q1 and Q2,Q3? (Watch it when you probe). Have you got an LCR to measure the caps for value and dissipation factor?
Caps have 10µ and 0,32, as they should. Dissipation factor I can't measure, also I'm pretty clueless how to measure the Vgs. Maybe I just replace the 840, I've just one left.
Maybe R4 pot value at 50 Ohm you meant? And 0.3V over T.P. you meant? R5 is a fixed 10 Ohm resistor as it should, yes?
Goes to plan then. Sit C1 and C2 like they don't touch free pads for just a little when you will complete it.
Makes sense your suspicious because can easily do an unwanted contact. Tomorrow I will finish the rest of reg & check it.
Fine then. Using a heat sinked Caddock for dummy load testing even, that is top style.🙂
How much raw DCin room does the rectification allow you now?
Was it the small cap doing the monkey business before? What do you think?
How much raw DCin room does the rectification allow you now?
Was it the small cap doing the monkey business before? What do you think?